IMO the choice between down tube shifters vs. brifters is a major factor, more so than 9 speed vs 8 speed. While some people are just the opposite and would prefer the down tube shifters, I much prefer being able to easily shift from the hoods (and the drops sort of with low end shimano).

STIs (brifters) take some getting used to, but then again so do down tube shifters if you've never used them.